\(Cu+Cl_2\xrightarrow[]{t^0}CuCl_2\\ CuCl_2+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2AgCl\\ Cu\left(NO_3\right)_2+2KOH\rightarrow Cu\left(OH\right)_2+2KNO_3\\ Cu\left(OH\right)_2\xrightarrow[]{t^0}CuO+H_2O\\ CuO+H_2SO_4\rightarrow CuSO_4+H_2O\\ CuSO_4+Mg\rightarrow MgSO_4+Cu\)
Cu+Cl2➝CuCl2
CuCl2+2AgNO3➝Cu(NO3)2+2AgCl↓
Cu(NO3)2+2NaOH➝ Cu(OH)2↓+2NaNO3
Cu(OH)2➝CuO+H2O
CuO+H2SO4➝CuSO4+H2O
CuSO4+Mg(OH)2➝Cu(OH)2↓+MgSO4